Merge pull request #1042 from SherlockNoMad/HistFix

Fix in HistogramWindowingImpl

util/histogram_windowing.cc

@@ -14,10 +14,6 @@
 
 namespace rocksdb {
 
-namespace {
-  const HistogramBucketMapper bucketMapper;
-}
-
 HistogramWindowingImpl::HistogramWindowingImpl() {
   env_ = Env::Default();
   window_stats_.reset(new HistogramStat[num_windows_]);
@@ -37,7 +33,6 @@ HistogramWindowingImpl::HistogramWindowingImpl(
 }
 
 HistogramWindowingImpl::~HistogramWindowingImpl() {
-  window_stats_.release();
 }
 
 void HistogramWindowingImpl::Clear() {
@@ -160,7 +155,7 @@ void HistogramWindowingImpl::SwapHistoryBucket() {
       }
 
       if (stats_.min() == stats_to_drop.min()) {
-        uint64_t new_min = bucketMapper.LastValue();
+        uint64_t new_min = std::numeric_limits<uint64_t>::max();
         for (unsigned int i = 0; i < num_windows_; i++) {
           if (i != next_window) {
             uint64_t m = window_stats_[i].min();